Max Gerhardt
@maxgerhardt.bsky.social
Today I wrote a OPAMP Arduino library for the Uno R4 WiFi and Minima. Tested with the function generator and oscilloscope from previous posts. Setup uses a 2x non-inverting amplifier circuit, just using two 10K resistors. Works great! Output at top, input at the bottom.
August 12, 2023 at 12:38 PM
Today I wrote a OPAMP Arduino library for the Uno R4 WiFi and Minima. Tested with the function generator and oscilloscope from previous posts. Setup uses a 2x non-inverting amplifier circuit, just using two 10K resistors. Works great! Output at top, input at the bottom.
All that's left to do is to screw it into its acrylic casing and store both function generator and oscilloscope safely. Until next time, where will need both of them in a project involving a yet little-used function of the Arduino Uno R4 WiFi board..
August 9, 2023 at 9:57 PM
All that's left to do is to screw it into its acrylic casing and store both function generator and oscilloscope safely. Until next time, where will need both of them in a project involving a yet little-used function of the Arduino Uno R4 WiFi board..
Output is a nice triangle wave. By pressing the button, we can switch between square, triangle / sawtooth and sine wave. The knobs adjust frequency (1Hz-20MHz), amplitude, offset and duty-cycle. All of them look really nice in the oscilloscope, perfect adjustable test signals.
August 9, 2023 at 9:55 PM
Output is a nice triangle wave. By pressing the button, we can switch between square, triangle / sawtooth and sine wave. The knobs adjust frequency (1Hz-20MHz), amplitude, offset and duty-cycle. All of them look really nice in the oscilloscope, perfect adjustable test signals.
REAL MOMENT OF TRUTH. Does the assembled function generator actually output anything or did I screw it all up?? Connecting the probe to the generator's GND and OUT signal and giving it power.. OH YES IT DOES!11
August 9, 2023 at 9:50 PM
REAL MOMENT OF TRUTH. Does the assembled function generator actually output anything or did I screw it all up?? Connecting the probe to the generator's GND and OUT signal and giving it power.. OH YES IT DOES!11
Okay, so now this board is potentially outputting a signal.. but we have no way of seeing that. Time to unpack the Hantek 6022BL oscilliscope, install the drivers and measurement software. Conveniently, the oscilloscope itself has a 1kHz calibration signal that we can use to check if the is working.
August 9, 2023 at 9:47 PM
Okay, so now this board is potentially outputting a signal.. but we have no way of seeing that. Time to unpack the Hantek 6022BL oscilliscope, install the drivers and measurement software. Conveniently, the oscilloscope itself has a 1kHz calibration signal that we can use to check if the is working.
First moment of truth. The last IC is put into its socket and my lab bench power supply is set to output the minimum 7V the board needs to power up.. Will it short circuit? Nope, it draws a nice 100mA, with no short-curcuit or explosion! Wohoo!
August 9, 2023 at 9:43 PM
First moment of truth. The last IC is put into its socket and my lab bench power supply is set to output the minimum 7V the board needs to power up.. Will it short circuit? Nope, it draws a nice 100mA, with no short-curcuit or explosion! Wohoo!
And before you know it, a whole evening is spent on meticulously soldering the together the components of the function generator kit. Starting with the smallest and low-profile components and working upwards. Checking off component after component, it starts coming together for a first test...
August 9, 2023 at 9:39 PM
And before you know it, a whole evening is spent on meticulously soldering the together the components of the function generator kit. Starting with the smallest and low-profile components and working upwards. Checking off component after component, it starts coming together for a first test...
The right is a Hantek 6022BL 2-ch. USB oscilloscope, I can look at my analog input and output signals with that. The left is a function generator built around the Maxim MAX038 chip. That will generate a test signal. But, some assembly required.. Soldering iron to the rescue!
August 9, 2023 at 9:33 PM
The right is a Hantek 6022BL 2-ch. USB oscilloscope, I can look at my analog input and output signals with that. The left is a function generator built around the Maxim MAX038 chip. That will generate a test signal. But, some assembly required.. Soldering iron to the rescue!
Before we dive into RISC-V in my microblog, a small project came up in between: For a testing a certain mixed-signal application (tba. later), I need two crucial things : An oscilliscope and a function generator. My home electronics lab had neither. But today, a small Amazon package arrived..
August 9, 2023 at 9:29 PM
Before we dive into RISC-V in my microblog, a small project came up in between: For a testing a certain mixed-signal application (tba. later), I need two crucial things : An oscilliscope and a function generator. My home electronics lab had neither. But today, a small Amazon package arrived..